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Finding the Fourth Proportional to 21,813.88, 32,722.02 and 7,021.72

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Solution

The fourth proportional to 21,813.88, 32,722.02 and 7,021.72 is: 10,532.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,813.88 : 32,722.02 = 7,021.72 : x
  2. Step 2: Convert to fraction form
    21,813.88/32,722.02 = 7,021.72/x
  3. Step 3: Cross multiply
    21,813.88x = 32,722.02 × 7,021.72
  4. Step 4: Simplify right side
    21,813.88x = 229,764,862.27
  5. Step 5: Solve for x
    x = 229,764,862.27/21,813.88
  6. Step 6: Final answer
    x = 10,532.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.